"When the stars were right, They could plunge from world to world through the sky; but when the stars were wrong, They could not live. But although They no longer lived, They would never really die. They all lay in stone houses in Their great city of R'lyeh, preserved by the spells of mighty Cthulhu for a glorious resurrection when the stars and the earth might once more be ready for Them."
- Old Castro, the Call of Cthulhu
Astronomist Peter Armstrong has noticed something strange about the gravitational effects Betelguese is having on the local area of space around it. While the star has been shrinking rapidly for a number of years, the events he is now seeing are inexplicable - until he recieves a mysterious message, and is nearly killed.
The stars will soon be right again. Betelguese is a dying star, every astronomer knows that, but what they don't know is that when it dies, it will set into motion a terrible chain of events. It is no coincidence that the three Great Pyramids are aligned to match with the stars of Orion's belt. Or, as the Egyptians called the constellation back then, Osiris. Sirius, the dog star, was his wife, Isis, and the seasonal change of the stars represented the death of Osiris at the hands of Set, and his resurrection by Horus.
But now the victory of Set is assured, written in the heavens. The age of Horus will pass, and the Age of Set will ascend. The stars will be right again. Cultists on earth prepare, knowing they must time the rituals for when Betelguese's nova is apparent over the night sky of the earth. The light, brighter than the moon, that would light up the night sky would serve as the liberating force, breaking the aeons old shackles that have prevented Them from once again ruling over the planet.
That is, unless Peter and his mysterious informant can stop them.